Chuck



se i. 18, 1951 M. PEDERSEN CHUCK Filed Nov. 18. 1949 IN VEN TOR.

44mm pede/"se/z OAZ/YE Y 25 Patented Sept. 18, 1951 CHUCK Morris Pedersen, San Francisco, Calif.; assignor to Paterson Pacific Parchment Company, a corporation of California Application November 18, 1949, Serial No. 128,114

- This invention relates to a new and novel form of chuck, which is particularly suited to some of the specialized requirements of the paper industry. It will therefore be described as it has been particularly adapted for use in that indus- "try', although it is not, obviously, limited to this :inits application.

In the handling of paper it is usual to wind. it

"upon a tubular core formed of paper. Because of "the compressible nature of the tubes, the'chucks used for gripping them must be capable of ap- "plying an adequate gripping pressure without distortion or breakage of the cores because these are commonly repeatedly re-used.

* An object of this invention is to provide a chuck 1 which applies a uniform gripping pressure over a relatively large area to minimize the distortion of the tubular members. The intensity of gripping force per unit area has been reduced in-my new forrn of chuck by a novel design which allows for much larger gripping area in a given chuck than was formerly possible with previous designs. In addition to a larger gripping surface, the new form of chuck minimizes gripping intensities by "automatically applying only as much pressure as is" needed to produce rotation of the paper core 'and the roll of paper Wound thereon. A combi nation of these two characteristics makes this chuck uniquely suitable for handling various type of paper rolls. A light but adequate grip is placed automatically on thin tubes carrying delicate tissue paper, while the same chuck automatically adjusts to the stronger grip needed to overcome the inertia of a heavy roll of newsprint. In either case, the tube is only gripped by the amount needed to induce rotation.

'Another object of this invention is to provide a chuck which is capable of producing gripping action in either rotational direction. Often in paper processing it is desirable to be able to perform both a wind and a rewind operation with one setting of the tubular core.

A further object of my invention is a chuck with a'greatly increased ease of disengagement. Be-

cause of the novel method of producing a gripthis invention should not be narrowly confined 3 Claims. (01. 279-2) screw I9.

to'that field, as it is expected that many'use's will be found for a chuck having the desirable characteristics described below.

In the drawings, Figure 1 illustrates a longitudinal plan view of a present preferred embodiment of the chuck.

Figure 2 illustrates a longitudinalsection of the chuckp Figure 3 is a vertical section on the line 3--3 in Figure 2 i v Figure 4 illustrates a plan view partially in section from line 4-4 in Figure 2.

Figure 5 isa section on line 55 of Figure 2. My invention may be briefly characterized as comprising a chuck with two concentrically mounted -sleeve-like members, the outer member being provided with gripping members and :means provided between the two sleeve-like members for rotating the gripping members upon relative rotation between the two sleeve-like members.

In accordance with this invention, an inner sleeve l'issecured as by set screw 8 to a suitable driver element which is drivenbya prime mover.

such element being shown as a "drive shaft 9.

Upon inner sleeve 1 is mounted solargear I I with an axis of rotation substantially coincident with the rotational axisof driveshaft 9. An outer cylindrical sleeve I2 is mounted for. rotation about the inner sleeve 1, being mounted on flanges 1,3 and I4; flange [3 is secured to the outer sleeve by screws 6, l0 and 15, while flange I4 is secured to the opposite end of the outer-sleeve by-set The-diameter of the outer sleeve I2 issuch that it fits snugly the inner surface of, the core to be mounted upon the chuck. The outersleeve I2 is slotted to receive oneor more core gripping members and, in the form illustrated, sleeve 12 is shown as slotted inthree positions, [6, I! and I8, spaced equidistantabout the periphery of the sleeve. Journalled in these slots. as in bearings 20" and 2|, are rotatable gripping'members 22, 23 and 24. Each gripping memher is provided with a planar surface 26 which,

'in the'disengaged position of the clutch, is tangential' to the outside surface of sleeve l2. Each 'a surrounding tubular member schematically illustrated as 25, through a radial distance indicated by line 21 in Figure 3. I

Rotation of the gripping members is effected by solar gear .9 enmeshed with the planetary gears' 28, and 30 respectively, secured to the extremitiesof'the'gripping members, 22, 23,and 24,

upon relative rotation between. the inner and the outer sleeve member. Flange 3! is secured on sleeve 1 by set screw 32 and said flange support stop 33. The relative angular rotation between the inner and outer sleeve is controlled by the engagement of stop 33 with stops 35 and 36 mounted on flange i 4; in the form illustrated, stop 33 is so placed that the device is only operativeiupon counterclockwise 'rotation.

In operation, atubular core member, indicated schematically at 25, is placed over the chuck while er gripping the inner surface of the tubular memthe chuck is in a stationary, disengaged position. Upon rotation of the drive-shaft 9, the inner member 1, being secured to the drive-shaft, rotates with the shaft. The'outer member 12,-

being pivoted around the axis of rotation of the inner member and functionally connected to it by the sun and planet gears does not start to rotate until the gripping members on the outer an oppositedirection between said first'and second member. I

I 2. A chuck of the character described capable =ber comprised of a first member adapted to be rotated in a selected direction, a second member mounted for rotation about an axis concentric to the rotational axis of the first member and mountedabout'said first member, said second member being .cylindrical and having spaced cymember have engaged the inner surfacgof the tubular core surrounding the outside member.

when the gripping members are engaged with the core, the components of the structure :rotate together. Because :of the nature "of the interconnection between the inner member and the ioutercmember, only such pressureis applied to the tubular member as is needed tomaintainthe e't'nial,:an'gularvelocity-of the three members.

While I have disclosed the device as including .fthreeigripping' members,--the.number of thesecan be varied to supply the gripping pressure. required for :a' :given :diameter :of tubular core and the load to be transmitted. .Thus, on a "small core and under a light torsional force a single :anemb'er. ,will :suifice, "as either the core, thetorsi-onaluforce 701 both are increased, the number should be increased. Those-skilledlin the art can readily determine the number and area of gripping surface required to transmit a given torsional force to *azgiven'core and suit the gripping'members to these factors.

Irclaim:

51. EA chuck of the character described capable pfzgrippin'g the "inner surface of the tubularnnember comprised 'of 1a first imember adapted to be rotated in a' selected direction, a :second memfber mounted for'rotation about an axis concentric to'the rotational axis of the first "member and mounted about said first member, said *second member being cylindrical and having spaced 'jcylindric'al receptacles therein extending longi- :tudina'lly of the second member and opening onto the cylindrical sur'faceof said second member'to provide a "narrow slot extending the length-10f said second member, cylindrical rotating g-rip- .ping members disposed in said slots in the second member, said rotating gripping members having an axis of :rotation substantially parallel to the concentric axis 'of rotation of said first andjsaid'second member, a pair of spaced :iianges "-mounted on said'secondmember and having said -gr'ipping mrinbers journalled therein, each of said gripping members having a gripping :surf-ace thereon substantially of the *width of the narrow slot 'opening in=the receptacle on which the "gripping member is mounted and being; movable between a first position wherein :each of, said 'gripp'in'g -=surfaces is in a plane substantially tan- *gential tothe outside cylindrical surface, and a "second position wherein said gripping "surface is in a plane substantially at right angles tosaid tangential zplane,*a solargear mountednpon said first "member with an axis of rotation-substan- "tially coincident to the axis or rotation ofsaid are; member, planetary gears mounted \on "said grlpping members having an axisiof rotation colindrical receptacles therein extending longitudinally of the second member and opening onto the cylindrical surface 10f said second member to provide ':a narrow slot extending the :length of said second "member, cylindrical rotating {gripping members disposed in said slots in the secfond member, said rotating v gripping members having an axis of rotation substantially parallel :to the *concentric axis -of rotation of said first and said second members, a pair'of spacedfianges mounted: on said first member and having :said gripping members journalled therein, .eachofsaid gripping -members having a planar surface thereon substantially 'ofthe WidthOf the mar-- row slot opening in the receptacle 'on which the 'gripping member :is mounted and being movable between a first positionwherein each of :said planar surfaces is in a plane substantially tan- :gentialto-the outside cylindrical surface of said "second member, and a second position wherein said planar surface is in .a .iplanesubstantially at right "angles with said tangential plane,:a:solar gear mounted upon said first member with-tan axis of rotation substantially coincident to the axis of "rotation 'of said first :member, planetary gears :mounted on said gripping members having an axis of rotation coincident with the 'axis 'of rotation of said grippingmembers, said-solarigear and said planetary *gear :being intermeshed to rotate said gripping members in one direction upon relative rotationb tween said first and said second member, in'one direction and .to rotate said gripping members in the opposite direction upon relative rotation in an opposite direction between said first "and second members and means-on isaid first "and-said second member to limit the :extent of relative angular rotation between said first and said second member in either direction.

3. A chuck of th character described capable of grippingthefinner surface of a tubular member comprised of ,a first member adapted to be 'rotated'in a'selected direction, asecond member mounted :for rotationabout :an axis concentric to 'the rotational *axis .of the first member, and mounted about said first member, .said -second :member;[being cylindrical and having threecylindricalreceptacles therein spaced equally about said second member and extending longitudinally of saidzsecond member, each of said receptacles =ope'ning onto the cylindrical surface ,of said second member to ;-provide a narrow slot extending the length of :said second member, three cylindrical rotating-gripping members disposedin-said slots in the second member, each of said rotating gripping :members having -a-1ongitudinal axis "sub- :stantially parallel to the concentric :-axis of IO- tation :of :said f rst and said second member p gpair of, spaced fianges mounted on :said second member and having said gripping members journalled therein, each of said gripping members having a planar surface thereon substantially of the width of the narrow slot opening in the receptacle on which the gripping member is mounted and being movable between a first position wherein each of said planar surfaces is in a plane substantially tangential to the outside cylindrical surface of said second member, and a second position wherein said planar surface is in a plane substantially at right angles to said tangential plane, a solar gear mounted upon said first member with an axis of rotation substantially coincident with the axis or rotation of said first member, planetary gears mounted on said gripping members having an axis of rotation coincident with the axis of rotation of said gripping members, said solar gear and said planetary gear being intermeshed to rotate said gripping members in one direction upon relative rotation between said first and said second member, in

one direction and to rotate said gripping members in the opposite direction upon relative rotation in an opposite direction between said first and second members and means on said first and said second member to limit the extent of relativ angular rotation between said first and said second member in either direction.

MORRIS PEDERSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 591,003 Nawrath Oct. 5, 1897 912,420 Seven Feb. 16, 1909 FOREIGN PATENTS Number Country Date 252,547 Italy Mar. 24, 1927 

